Title :
Chirped-pulse stimulated Raman scattering in barium nitrate
Author :
Zhavoronkov, N. ; Noack, F. ; Petrov, V.
Author_Institution :
Dept. of Chem., Kobe Univ., Japan
Abstract :
Summary form only given. Stimulated Raman scattering (SRS) in pressurized gases, liquids and solids is widely used for frequency conversion of energetic nanosecond and picosecond laser pulses. However, when the pulse duration is shorter than the Raman mode dephasing time T/sub 2/ the SRS threshold drastically increases as compared to the stationary regime, and in the femtosecond regime effects as self-phase modulation (SPM), self-focusing (SF), and continuum generation become predominant. Chirping the pump pulses can serve to suppress these intensity dependent effects, and we believe we present the first results with barium nitrate Ba(NO/sub 3/)/sub 2/ which is one of the most promising solid-state Raman shifters. Its strong A/sub g/-vibrational Raman mode at 1047.3 cm/sup -1/ has a linewidth of 0.4 cm/sup -1/ (T/sub 2/=25 ps).
Keywords :
barium compounds; chirp modulation; optical frequency conversion; optical materials; optical pulse generation; optical pulse shaping; optical pumping; optical self-focusing; self-phase modulation; stimulated Raman scattering; vibrational modes; A/sub g/-vibrational Raman mode; Ba(NO/sub 3/)/sub 2/; Raman mode dephasing time; SRS threshold; chirped-pulse stimulated Raman scattering; chirping; continuum generation; energetic laser pulses; femtosecond regime; frequency conversion; intensity dependent effects; linewidth; nanosecond laser pulses; picosecond laser pulses; pressurized gases; pressurized liquids; pressurized solids; pulse duration; pump pulses; self-focusing; self-phase modulation; solid-state Raman shifters; stationary regime; stimulated Raman scattering; Barium; Chirp; Frequency conversion; Gas lasers; Gases; Laser modes; Liquids; Pulse modulation; Raman scattering; Solids;
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
DOI :
10.1109/CLEO.2000.906852
